Hi, on machine-a where btrfs is not root inspect-internal works fine. -------- # filefrag -v /btrfs/tf1 Filesystem type is: 9123683e File size of /btrfs/tf1 is 409600 (100 blocks, blocksize 4096) ext logical physical expected length flags 0 0 3101 13 1 13 3133 3113 87 eof /btrfs/tf1: 2 extents found ; 3101 * 4096 12701696 # btrfs inspect-internal logical-resolve 12701696 /btrfs /btrfs/tf1 ------ However on machine-b with a big file with btrfs as root, inspect-internal fails.. as below. ------ # filefrag -v /root/bigfile | head Filesystem type is: 9123683e File size of /root/bigfile is 10737418240 (2621440 blocks, blocksize 4096) ext logical physical expected length flags 0 0 13799325 3015 1 3015 13787311 13802339 8 :: ; 13787311 * 4096 56472825856 # df -k . Filesystem 1K-blocks Used Available Use% Mounted on /dev/mapper/vg_dev-lv_root 62128128 52788788 1552008 98% / # btrfs inspect-internal logical-resolve 56472825856 / ioctl ret=-1, error: Inappropriate ioctl for device ------ any clue on whats wrong ? Thanks -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html